Harmful microparticle detection device before clinical use of injection

Abstract

The invention discloses a harmful microparticle detection device before clinical use of an injection. The harmful microparticle detection device comprises an infusion bottle to be detected, a comparison infusion bottle, a dot type ultrasonic receiving transducer, a comparison ultrasonic transducer, a detection ultrasonic transducer, a high-accuracy telescopic mechanism, a detection device shell, a water inlet electromagnetic valve, a drainage electromagnetic valve, an infusion bottle bracket, a clamping mechanism, a centrifugal motor, a microprocessor, a touch screen, a multi-channel ultrasonic signal generating and receiving module, a high-speed A / D (Analog / Digital) conversion module, an electromagnetic valve control module, a telescopic mechanism driving control module and a centrifugal motor driving control module. According to the technical scheme, non-contact, non-invasion and non-damage harmful microparticle detection with a measuring error correction function can be realized on the basis of a triple medium ultrasonic back scattering and centrifugal settling technology; and the harmful microparticle detection device has a simple structure and is low in cost.

Description

technical field [0001] The invention relates to a detection device related to medical injections, in particular to a detection device for harmful particles of injections before use. Background technique [0002] Harmful particles referred to in this technical solution refer to insoluble particles that exist in injections and can be observed visually under specified conditions, and their particle size or length is usually >50 μm. A large number of studies have proved that harmful particles can cause potentially serious harm, such as inflammatory reactions, granulomas, tumors, pyrogen-like reactions, etc. Larger or too many particles in the infusion will cause local blood vessel blockage and thrombus, resulting in insufficient blood supply or edema or phlebitis due to hypoxia. The 2010 edition of "Chinese Pharmacopoeia" stipulates that for insoluble particles contained in injections, those with a diameter of 50 μm or more must be detected. If there is a convenient and qui...

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Problems solved by technology

Therefore, in this type of detection method, the ultrasonic emission probe must be fixed on the outer wall of the measured object, so it is impossible to detect the particle size falling in the near-field area of ​​the sound pressure; some scholars also propose to pass the liquid to be tested through a special ultrasonic probe A thin tube is used to detect the particle size and ensure a single particle at a time, but this method is inefficient and requires modification of the measured object and container, and cannot be non-invasive and non-destructive for detection objects such as bottled injections sexual detection

In addition, considering that the relationship curve between the size factor ka and the backscattering sound pressure is non-monotonic, in the case of constant ultrasonic emission frequency, it is difficult to guarantee the uniqueness of the detection results, and accurate detection results cannot be obtained

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